A friend of the Dayton, Ohio, gunman who killed nine people, including his sibling, in a shooting rampage outside a bar last weekend told federal investigators he bought and stored body armor, ammunition and part of the firearm used in the deadly attack. It’s unknown whether the friend, Ethan Kollie, was aware of gunman Connor Betts’s plan to commit a mass murder. Kollie was charged Monday with lying about his drug use on a firearms form for an unrelated purchase.